BACKGROUND: This study used a novel protocol to test the hypothesis that a plateau in oxygen consumption (VO(2 max)) during incremental exercise testing to exhaustion represents the maximal capacity of the cardiovascular system to transport oxygen. METHODS:Twenty-six subjects were randomly divided into two groups matched by their initial VO(2 max). On separate days, the reverse group performed (i) an incremental uphill running test on a treadmill (INC(1)) plus verification test (VER) at a constant workload 1 km h(-1) higher than the last completed stage in INC(1); (ii) a decremental test (DEC) in which speed started as same as the VER but was reduced progressively and (iii) a final incremental test (INC(F)). The control group performed only INC on the same days that the reverse group was tested. RESULTS:VO(2 max) remained within 0.6 ml kg(-1) min(-1) across the three trials for the control group (p=0.93) but was 4.4% higher during DEC compared with INC(1) (63.9 ± 3.8 vs 61.2 ± 4.8 ml kg(-1) min(-1), respectively, p=0.004) in the reverse group, even though speed at VO(2 max) was lower (14.3 ± 1.1 vs 16.2 ± 0.7 km h(-1) for DEC and INC(1), respectively, p=0.0001). VO(2 max) remained significantly higher during INC(F) (63.6 ± 3.68 ml kg(-1) min(-1), p=0.01), despite an unchanged exercise time between INC(1) and INC(F). CONCLUSION: These findings go against the concept that a plateau in oxygen consumption measured during the classically described INC and VER represents a systemic limitation to oxygen use. The reasons for a higher VO(2) during INC(F) following the DEC test are unclear.
RCT Entities:
BACKGROUND: This study used a novel protocol to test the hypothesis that a plateau in oxygen consumption (VO(2 max)) during incremental exercise testing to exhaustion represents the maximal capacity of the cardiovascular system to transport oxygen. METHODS: Twenty-six subjects were randomly divided into two groups matched by their initial VO(2 max). On separate days, the reverse group performed (i) an incremental uphill running test on a treadmill (INC(1)) plus verification test (VER) at a constant workload 1 km h(-1) higher than the last completed stage in INC(1); (ii) a decremental test (DEC) in which speed started as same as the VER but was reduced progressively and (iii) a final incremental test (INC(F)). The control group performed only INC on the same days that the reverse group was tested. RESULTS: VO(2 max) remained within 0.6 ml kg(-1) min(-1) across the three trials for the control group (p=0.93) but was 4.4% higher during DEC compared with INC(1) (63.9 ± 3.8 vs 61.2 ± 4.8 ml kg(-1) min(-1), respectively, p=0.004) in the reverse group, even though speed at VO(2 max) was lower (14.3 ± 1.1 vs 16.2 ± 0.7 km h(-1) for DEC and INC(1), respectively, p=0.0001). VO(2 max) remained significantly higher during INC(F) (63.6 ± 3.68 ml kg(-1) min(-1), p=0.01), despite an unchanged exercise time between INC(1) and INC(F). CONCLUSION: These findings go against the concept that a plateau in oxygen consumption measured during the classically described INC and VER represents a systemic limitation to oxygen use. The reasons for a higher VO(2) during INC(F) following the DEC test are unclear.
Authors: Paula F Sperlich; Hans-Christer Holmberg; Jennifer L Reed; Christoph Zinner; Joachim Mester; Billy Sperlich Journal: J Sports Sci Med Date: 2015-05-08 Impact factor: 2.988
Authors: Paulo Azevedo; Dharini M. Bhammar; Tony G. Babb; T. Scott Bowen; Klaus K. Witte; Harry B. Rossiter; Julien V. Brugniaux; Ben D. Perry; Ricardo Dantas de Lucas; Tiago Turnes; Jeann L. Sabino-Carvalho; Thiago Ribeiro Lopes; Rodrigo Zacca; Ricardo J. Fernandes; Greg L. McKie; Tom J. Hazell; Lucas Helal; Anderson Donelli da Silveira; Craig Ryan McNulty; Robert Andrew Roberg; Tom E. Nightingale; Abdullah A. Alrashidi; Evgeny Mashkovskiy; Andrei Krassioukov; Pierre Clos; Davy Laroche; Benjamin Pageaux; David C. Poole; Andrew M. Jones; Gustavo Z. Schaun; Diego Santos de Souza; Tatiane de Oliveira Barreto Lopes; Mary Vagula; Li Zuo; Tingyang Zhao Journal: J Appl Physiol (1985) Date: 2018-07-01
Authors: Weerapong Chidnok; Fred J Dimenna; Stephen J Bailey; Mark Burnley; Daryl P Wilkerson; Anni Vanhatalo; Andrew M Jones Journal: Eur J Appl Physiol Date: 2012-09-02 Impact factor: 3.078
Authors: Nuno Manuel Frade de Sousa; Danilo Rodrigues Bertucci; Gabriel Medeiros de Sant'Ana; Pedro Luiz Ribeiro Angelucci Padua; Diogo Mello da Rosa Journal: Sci Rep Date: 2021-06-23 Impact factor: 4.379